1.6A: Campo de una carga puntual
- Page ID
- 131746
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De la ecuación 1.5.3 y de la definición de intensidad de campo eléctrico se deduce que el campo eléctrico a\(r\) from una distancia una carga puntual\(Q\) es de mag nitude
\[\tag{1.6.2}E=\frac{Q}{4\pi\epsilon_0 r^2}.\]
Esto se puede escribir en forma vectorial:
\[\textbf{E}=\frac{Q}{4\pi\epsilon_0 r^2}\hat{\textbf{r}}=\frac{Q}{4\pi \epsilon_0 r^3}\textbf{r}.\tag{1.6.3}\]
Aquí\(\hat{\textbf{r}}\) is a unit vector in the radial direction, and \(\textbf{r}\) is a vector of length \(r \) in the radial direction.